1 files changed, 4 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/associations/builder/has_one.rb b/activerecord/lib/active_record/associations/builder/has_one.rb
index 216d6abec1..f359efd496 100644
--- a/activerecord/lib/active_record/associations/builder/has_one.rb
+++ b/activerecord/lib/active_record/associations/builder/has_one.rb
@@ -1,10 +1,10 @@
 module ActiveRecord::Associations::Builder
   class HasOne < SingularAssociation #:nodoc:
-    def self.macro
+    def macro
       :has_one
     end
 
-    def self.build_valid_options(options)
+    def valid_options
       valid = super + [:order, :as]
       valid += [:through, :source, :source_type] if options[:through]
       valid
@@ -14,6 +14,8 @@ module ActiveRecord::Associations::Builder
       [:destroy, :delete, :nullify, :restrict_with_error, :restrict_with_exception]
     end
 
+    private
+
     def self.add_before_destroy_callbacks(model, reflection)
       super unless reflection.options[:through]
     end